PHP实现的用户注册表单验证功能简单示例

2024-05-04 22:40:48

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本文实例讲述了PHP实现的用户注册表单验证功能。分享给大家供大家参考，具体如下：

注册界面

  <h1>用户注册</h1>  <form method="post" action="register_verify.php">    <input type="text" placeholder="用户名" name="username"><br><br>    <input type="password" placeholder="密码" name="password"><br><br>    <input type="password" placeholder="重复密码" name="password2"><br><br>    <label>性别：      <input type="radio" name="sex" value="男" checked="checked">男      <input type="radio" name="sex" value="女">女</label><br><br>    <input type="email" placeholder="邮箱" name="email"><br><br>    <button class="btn" type="submit">注册</button>  </form>

register_verify.php

<?phprequire "mysql.php";      //导入mysql.php访问数据库$username=$_POST['username'];$password=$_POST['password'];$password2=$_POST['password2'];$sex=$_POST['sex'];$email=$_POST['email'];if(checkEmpty($username,$password,$password2,$sex,$email)){  if(checkpwd($password,$password2)){    if(checkEmail($email)){      if(insert($username,$password,$sex,$email))        echo"注册成功";    }  }}//方法：判断是否为空function checkEmpty($username,$password,$password2,$sex,$email){  if($username==null||$password==null||$password2==null){    echo '<html><head><Script Language="JavaScript">alert("用户名或密码为空");</Script></head></html>'       . "<meta http-equiv=/"refresh/" content=/"0;url=register.html/">";  }  else{    if($sex==null){      echo '<html><head><Script Language="JavaScript">alert("性别为空");</Script></head></html>' .          "<meta http-equiv=/"refresh/" content=/"0;url=register.html/">";    }    elseif($email==null){      echo '<html><head><Script Language="JavaScript">alert("邮箱为空");</Script></head></html>' .          "<meta http-equiv=/"refresh/" content=/"0;url=register.html/">";    }    else{      return true;    }  }}//方法：检查两次密码是否相同function checkpwd($password,$password2){  if($password==$password2)    return true;  else    echo '<html><head><Script Language="JavaScript">alert("两次密码不一致");</Script></head></html>' .        "<meta http-equiv=/"refresh/" content=/"0;url=register.html/">";}//方法：邮箱格式验证function checkEmail($email){  $preg = '/^(/w{1,25})@(/w{1,16})(/.(/w{1,4})){1,3}$/';  if(preg_match($preg, $email)){    return true;  }else{    echo '<html><head><Script Language="JavaScript">alert("邮箱格式有误");</Script></head></html>' .        "<meta http-equiv=/"refresh/" content=/"0;url=register.html/">";  }}//方法：将数据插入数据库中function insert($username,$password,$sex,$email){  $conn=new Mysql();  $sql="insert into user VALUE (null,'$username','$password','$sex','$email')";  $result=$conn->sql($sql);  if($result){    return true;  }  else{    echo '<html><head><Script Language="JavaScript">alert("写入数据库失败");</Script></head></html>' .        "<meta http-equiv=/"refresh/" content=/"0;url=register.html/">";  }  $conn->close();}

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